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Basic speech recognition for spoken dialogues

Author: Van Heerden, C ; Barnard, E ; Davel, M Date: Sep 2009 Spoken dialogue systems (SDSs) have great potential for information access in the developing world. However, the realisation of that potential requires the solution of several challenging problems, including the development of sufficiently ... Read more
Collecting and evaluating speech recognition corpora for nine Southern Bantu languages

Author: Badenhorst, JAC ; Van Heerden, C ; Davel, M ; Barnard, E Date: Mar 2009 The authors describes the Lwazi corpus for automatic speech recognition (ASR), a new telephone speech corpus which includes data from nine Southern Bantu languages. Because of practical constraints, the amount of speech per language is ... Read more
Comparing grapheme-based and phoneme-based speech recognition for Afrikaans

Author: Basson, WD ; Davel, MH Date: Nov 2012 This paper compares the recognition accuracy of a phoneme-based automatic speech recognition system with that of a grapheme-based system, using Afrikaans as case study. The first system is developed using a conventional pronunciation dictionary, ... Read more
Cross-bandwidth adaptation for ASR systems

Author: Kleynhans, N ; Barnard, E Date: Dec 2013 Mismatches between application and training data greatly reduce the performance of automatic speech recognition (ASR) systems. However, collecting suitable amounts of in-domain and application-specific data for training is resource intensive ... Read more
A distributed approach to speech resource collection

Author: Molapo, R ; Barnard, E ; De Wet, Febe Date: Dec 2013 The authors describe the integration of several tools to enable the end-to-end development of an Automatic Speech Recognition system in a typical under-resourced language. The authors analyse the data acquired by each of the tools and develop ... Read more
Efficient data selection for ASR

Author: Kleynhans, NT ; Barnard, E Date: Oct 2014 Automatic speech recognition (ASR) technology has matured over the past few decades and has made significant impacts in a variety of fields, from assistive technologies to commercial products. However, ASR system development is a resource ... Read more
Error analysis of a public domain pronunciation dictionary

Author: Martirosian, O ; Davel, M Date: Nov 2007 The authors explore pattern recognition techniques for verifying the correctness of a pronunciation lexicon, focusing on techniques that require limited human interaction. They evaluate the British English Example Pronunciation (BEEP) dictionary ... Read more
HMM adaptation for child speech synthesis using ASR data

Author: Govender, Avashna ; Nouhou, B ; De Wet, Febe Date: Nov 2015 Acquiring large amounts of child speech data is a particularly difficult task. One could therefore consider the possibility to add existing corpora of child speech data to the severely limited resources that are available for developing child ... Read more
Multilingual speaker age recognition: regression analyses on the Lwazi corpus

Author: Feld, M ; Barnard, E ; Van Heerden, C ; Muller, C Date: Dec 2009 Multilinguality represents an area of significant opportunities for automatic speech-processing systems: whereas multilingual societies are commonplace, the majority of speechprocessing systems are developed with a single language in mind. ... Read more
The NCHLT speech corpus of the South African languages

Author: Barnard, E ; Davel, MH ; Van Heerden, C ; De Wet, Febe ; Badenhorst, J Date: May 2014 The NCHLT speech corpus contains wide-band speech from approximately 200 speakers per language, in each of the eleven of cial languages of South Africa. We describe the design and development processes that were undertaken in order to develop ... Read more
The relationship between automatic assessment of oral proficiency and other indicators of first year students' linguistic abilities

Author: De Wet, Febe ; Niesler, T ; Van der Walt, C Date: Nov 2012 Academic literacy proficiency is key to the success of a student at university. Currently, the large-scale assessment of language proficiency, particularly at higher education levels, is dominated by reading and writing tests because listening ... Read more
A smartphone-based ASR data collection tool for under-resourced languages

Author: De Vries, NJ ; Davel, MH ; Badenhorst, J ; Basson, WD ; De Wet, Febe ; Barnard, E ; De Waal, A Date: Jan 2014 Acoustic data collection for automatic speech recognition (ASR) purposes is a particularly challenging task when working with under resourced languages, many of which are found in the developing world. We provide a brief overview of related ... Read more
Using generalized maxout networks and phoneme mapping for low resource ASR- a case study on Flemish-Afrikaans

Author: Sahraeian, R ; Van Compernolle, D ; De Wet, Febe Date: Nov 2015 Recently, multilingual deep neural networks (DNNs) have been successfully used to improve under-resourced speech recognizers. Common approaches use either a merged universal phoneme set based on the International Phonetic Alphabet (IPA) or a ... Read more

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Browsing by Subject "ASR"

Browsing by Subject "ASR"

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